If you have ever called your London GP at 8:03am only to hear “all appointments are gone,” this guide is for you. Same-day appointments exist, but they are released and filled in a specific pattern. Once you understand how the system rations them, you can get seen far more reliably. Here is what works in practice, plus the backup options when your surgery is genuinely full.

Why Same-Day Slots Vanish So Fast

Most NHS GP surgeries hold back a batch of “on-the-day” appointments that open at 8am. Demand in dense London boroughs often exceeds these slots within minutes. The cause is simple maths: a practice with several thousand registered patients may release only a few dozen urgent slots. This is why the phone line jams and online booking greys out almost instantly.

Understanding this changes your strategy. You are not competing for a leisurely booking. You are competing in a short, timed release. Speed and channel choice decide whether you get in.

The Channels, Ranked by Speed

NHS App or online triage

Many London practices now use an online triage form (often